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自己写个sqrt()呗！ cmath里的sqrt()怎么做的？二分么？

Posted by semonteer at 2005-09-17 18:10:46 on Problem 2208
In Reply To:用了三个sqrt就是总是WA 换成两个sqrt就AC Sqrt的精度好差啊 Posted by:zzningxp at 2005-09-17 17:29:58

Followed by:

FPU指令，绝对比你自己乱搞的精确 (0) frkstyc 2005-09-17 18:12:47
- 参加电路竞赛时，那个单片机用的gcc编译器做的剧烂，用不了c语言的math.h，多亏急中生智想到了自己写二分，请好那玩艺对时间没什么要求 (0) semonteer 2005-09-17 18:21:12
  - 你都说是单片机了，你还能期望它能提供浮点运算啊…… (0) xreborner 2005-09-17 19:08:08
    - 按常理来讲，这个工作是编译器做的 (0) semonteer 2005-09-17 20:43:15
      - 是cpu提供的浮点数运算功能好不好 (0) xreborner 2005-09-17 21:05:32
        您做过单片机么？ (0) semonteer 2005-09-17 21:40:47
- Re:FPU指令，绝对比你自己乱搞的精确 (4) hoop 2007-08-24 09:56:05

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